抗滑桩设计推力计算方法研究

滑坡推力是抗滑桩设计推力的重要依据,工程中通常使用剩余推力法来计算滑坡推力。为了比较准确合理地计算出抗滑桩的设计推力,提出了在剩余推力法基础上的一种新的抗滑桩设计推力取值方法。分析极限平衡状态下和工程安全要求下各条块的剩余下滑力,选择合理的桩位,使得抗滑桩位于滑坡体的抗滑段;然后调整桩后滑体的剩余下滑力,其调整量一方面保证桩前桩后滑体满足工程安全要求,另一方面则作为抗滑桩设计推力的修正依据,其过程由程序实现。通过实例证明了该方法的合理性。同时对今后抗滑桩设计推力的合理取值提供了参考作用。

CALCULATION METHOD OF DESIGNED THRUST FOR ANTI-SLIDE PILE

The landslide thrust is the important evidence for the designed thrust of anti-slide pile.It is often calculated with the residual thrust method.On the basis of residual thrust method,a new method to find the designed thrust of anti-slide pile is proposed for an accurate and reasonable result.On the condition of limit equilibrium state and safety requirement,the residual thrust is calculated and reasonable pile position is determined to make it locate the anti-slide segment of landslide.Residual thrust of landslide lies behind the pile is adjusted to ensure not only that adjustment quantity can meet safety requirement,but also it can be modify on the basis of the designed thrust of anti-slide pile.All of this consideration is realized with procedure.The method is verified with examples.It also provides reference function for reasonable value of the designed thrust of anti-slide piles in the future.